package collectionexercise02;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class SortPoint {
    public static void main(String[] args) {
        List<Point> list=new ArrayList<>();
        list.add(new Point(1,2));
        list.add(new Point(31,4));
        list.add(new Point(54,6));
        list.add(new Point(7,8));
        list.add(new Point(90,10));
        System.out.println(list);
        list.sort(new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
                int len1=o1.getX()*o1.getX()+o1.getY()*o1.getY();
                int len2=o2.getX()*o2.getX()+o2.getY()*o2.getY();
                return len1-len2;
            }
        });
        System.out.println("list排序后："+list);

        Collections.sort(list, new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
                return o1.getX()-o2.getX();
            }
        });
        System.out.println("list排序后："+list);

        list.sort((o1,o2)->{
            int len1=o1.getX()*o1.getX()+o1.getY()*o1.getY();
            int len2=o2.getX()*o2.getX()+o2.getY()*o2.getY();
            return len2-len1;
        });
        System.out.println("list降序后："+list);
    }


}
